Multicolor Rainbow Colorful Shell Glass Layered Beaded Necklace 20" Multi Strand

Colorful four strand beaded necklace.  The larger beads look to be made of shell & I believe the other beads are made of glass.  The necklace measures 20" long & this includes a chain extender of just over 3".  The largest beads are 1/2" in diameter ~ approx.  Very good condition with some light signs of use.